Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2d4679d9cf794d93a2e9415bd525dc814297e42a49e4d1a16050bc4f1906eb3' 
  AND token = 'fjizSYxAMeB2waMomlV7F5OXMCOjnlxEdQMU68LLxDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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