Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eee6e60ada720c82b6bcc277c7fffc69aa2329cd15f4bb57c36ba3a51755bca3' 
  AND token = '1ydK+SRo8nr4QaPyKhYSjpclflBOe+GfWiYMCQbb5lQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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