Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75c3da43fe80b81df84f5396e14697e9e15f89abe6d2d0c507e8d315ae89fdf2' 
  AND token = '5Q+qAGELrUnQRQCYupac1Ro1X/zPVZdo2oB6E22fjzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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