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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '656e4e66fe6f8ce073c1c105cbe1123b2333ff116f3f85eae867d4a1dc6828c1' 
  AND token = 'V4UMYU3bj7uX3kkCwnR5IZZu/h1ZwXGBqEeOeJ/3jYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00075

JSON explain

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