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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c80146465c3119d06a4124d86dec33feb95891c8faf931c12d3dc7988f9ca4e' 
  AND token = 'wxmPcGiOcCa8sQSJnZPwwCxP8p32LO2FEMafjSJkrLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}