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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c7cf9d7e2ef71c0b8e8a101d416baf9d0e4ac9c2b690d9c29fd119adc02ce65f' 
  AND token = 'znyAPb5riETZP1QQCr9dKpNndqbVAMvePDnp8QwNIAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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