Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfe8aaa495a9c8e2147c81e92ac169df45f77437a7af4e51f11552334fbb08ee' 
  AND token = 'dlbxwebWWu6qEaaHAMEr/3Nc51pfF//AXgVSSnjG2co=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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