Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b5e3ec340660d90c7cf691fd0fed1a36fd210451e3b94c42a22f85b5467281f2' 
  AND token = 'JevjOIdvcmSRFuVm26kxADx9VW9laW4vIB3T+1aq/X0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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