Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5914861a5e0ab0d71d01149df38a3f3397c499367be5a652556f5a6938e67f3' 
  AND token = '6jA5ryG6o3FspUtKlF/5+wYWm7W7Cy6RTEqG1e+8TUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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