SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd2a67225f565ac340bb51895cc168db490ec8027405ad176abb1dd9986506116' 
  AND token = 'WrH/IY2WvxfjbyZLBT6pnIUqvJ9ncqDkGrW36GO05u8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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