SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ec26e935071f96e73f13012c4b24ebef9113faa5e9ade6cbc0aa32f066d4664' 
  AND token = 'VAvVwKobMZ7/mRuBUEpFIwrdVO+ZwNjOfsAt8lTjNhU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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