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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2bbaf2a682b47636d74ce9e8e8b3934f9b125ae49abb178ceaf3eff4270d4b38' 
  AND token = 'PbzWbvndQfTw6UClfvq03nJSf7mzSVR7IHu1sdC7eqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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