SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '90a36d012d9aec7024ebc8c79471e98afb5b63ed539e327bab9a421851c4e8e1' 
  AND token = 'L+hnvwgiOVbZlzfG+dKa32BmhE/u3n/SRd42yWI8lX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00072

JSON explain

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