Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8577db0eb10b67e9a6eabac4c2059735e7cf26700a97198b1b3d902c5334410' 
  AND token = 'pTe4XpBio1iyVIy2eGHjcj9T9vVKUPN1CcOt9S89g2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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