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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '986a6a0ffc2877e8d85601f6220f811f17f7b91a5208df585715e54ff275b962' 
  AND token = 'x9tdQuKfJ5bY0eWUWqzc9hgYnsTIYFSHuNjMFycNbGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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