Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1269bb1059460a7c2463b72e62b668738bf40cc377122c69f1450ace1fbbe5ca' 
  AND token = '0xZbd7KCc0UeUyv7fduV6hv69B5VZ0318FN23ZL9fHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}