Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f2c06e3bfb4a2391cb54b182eaed2fd53c3bda8f8d1496e552f2498dfd8d8d60' 
  AND token = 'r/lL4qKZL8snlTuAyHTjnR1BOcKBlFxVxICUjeuA0lk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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