SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '75d8574c6d57161fbcc53aa77e51f9a89a3dd4242af81625fe46d788fb0089c1' 
  AND token = 'XvcTByfEBCvIeTqT1MGGADH64Yu2AnquKw7NMtqQgTk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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