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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41aef62f6574f62ba197e3702f27961c97e806e91a9499759ba45239a0a376b2' 
  AND token = 'YZc34qoTT+7BjPzkKpoz43R9TXkcDze5nR/HhiD0qgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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