SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee2de0772fbad3d08abb7a9a289cd5b8b8573cb3d78096bc9889d5b1e1778a42' 
  AND token = 'P+hPjIm8/jRYmDqiU/iSMCJNcKCJZgYiGaGVMNAQfP0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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