SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bd208179de8bfc6afd0885e2c867b1f5328456ac632361e74ae1e59330ed615c' 
  AND token = 'HxjpkNFKJXW9WTMNRaqQ/zpElh2BHv5FONUFsZEuWWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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