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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab1379a75abb84f73f238b7b8c1abb7ae8ea2ff41df4e2b5fbb26626c2ca4991' 
  AND token = 'Zy91vuSn6/nUIRFUm3UlrMPGItlQg8hSGyawQ3KkiyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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