Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fcb3138fd8dfd85cf7999abae4aa95bbeb10741948e36ac3ed3d8cf077a301e' 
  AND token = 'orSRh6alO/bdaICJ2bSLfdnxnLczZ20Hk8fagSl+hp4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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