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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e68507e8a7f398ee32b370a1d1a11a6d75b986a8f761bff81113e125666dbc54' 
  AND token = 'Wn0NYjgfClsKkcpCbyGORxxNa+wCX8CD6UwGIEz/p/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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