Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc548a25310c7f0e2e66dec2474de448d0e51875d542bd68ef4ac03dcf62f6ae' 
  AND token = 'qF7T0Wz3/YuRhm6Mz/tqaSchcRMB7FjQYmbNQ8I8R5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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