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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0da08ea907fa6de8cc21a153ad13f751e48bb34346ab21af843c93dc9ea89f3c' 
  AND token = 'UcfOGv72gLufYngDw5BeSkEmWvF0Q+PCmBgMPOn0FlI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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