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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '92ccf006358f29b48a028a8242fe40041bc627a3e1a2411480fe022f2509c754' 
  AND token = 'A4YiQs7Pz8tuTwTN+jOvPNv0t+wCS3uDUWW4PXh46KY=' 
  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"
    }
  }
}