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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '03d6d5ce5f7d984defe6804471d83a24413078d2f882c365aa49933afcf7c87d' 
  AND token = 'KdUH/CCEZabKi2Y0jtUXJePDy5pr0kXr4neViSiEBR4=' 
  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"
    }
  }
}