Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dd777ab65638a66fa3ebdbe8786d93ad5952c4eff098fdec7fa5f9b4d7b65b59' 
  AND token = 'ZwXlW4fAzkawmAetr0uTUsOBxWYyYVdenpm8S0gMr2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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