Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1ec7424470b12659420a9fee0e4d3a35b9b817ffc7c349655992ec1ad75bcb1' 
  AND token = 'd1NUHbV3941V1J7VG6v86UiksbwydaxXs32dR71GcDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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