Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c50646c4f28509bc78a8a7971e41b5de45531552c71e47a4a1c04b2a1db6354d' 
  AND token = 'coTt2GHA6dIvVacl6lCAnrCN88ovk8JKvmIQ0vZQKno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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