Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e5ac1e36def1d5bbf8be66d4d8d9adc2a4fd1d1afab580e64981348602f898a' 
  AND token = 'qwfpTIJF3T36UPtkA4nPRN8aEjwQbLj4oadGMMvUyNE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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