SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '82d00026850fe0b4f22a781c188cebeb0706de4c30f4b609cc1ebdc7a81a95d1' 
  AND token = 'aLwwfADsCjw4/QPhVQKvFkOSSgN6+v9xVCB3Q2YN2mg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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