SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd4611263a3a7c69ba0ebc8e542fe9065fd09ae8213bcdbca854e7d30467f44b1' 
  AND token = 'P01kdGSGg3zKbstcq+CBSWw84qQRvKLhl7PWYn+3eYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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