Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9f285e10d6ad6abb2e16afc9e1462d892f23ebf3b8e2fc21fa3c9b2c88d398f' 
  AND token = 'AWo3+GyvNsDXfgjNPPoFj6F7iWSQH5yc0XIgmNa+vYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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