Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed09cbd8a841bd791a3b3039978b5da748a19d2ce0b6344bc4a7359439738218' 
  AND token = 'pNnNflRP3FaGAj2qLeaLFOsWndZIpZpdQI6aAMvHN/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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