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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7db389f76c074021f7f4b6f29dd2adf919797dbf09f1080730ad3c88ad9981a8' 
  AND token = 'K2eeFaaoIKIhMO6NagduD1BJwWFPP4CW3orOeHnGKB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}