Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c5a5cc8986a4f4e191d63c8c0c64a38cb1e6b47e04c33eaf809f9b9b66c1a7ed' 
  AND token = 'whuPW3SvVKUmFPl5Hi6a58iaKlH2/wE/3SplZecSCSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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