SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9a0b7712b6348a49f5abf15c152dea971c1178ca27838d6df516f302b8938ab8' 
  AND token = 'uHiTVchi3Xd8zIGCo8wlzpB1rmM+BNuN8M4UAh+J7T0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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