Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b19f6b1b4d9a48a3deca323cd6a4025b1753ba98ab329627f29a5652b5fab824' 
  AND token = 'YUXnASKWIR78k5nop7Z3h7jDrnOieAsQBx9r3a+BUOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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