Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ed815a746c96a851579541ec71ede06c7b7e5586969cd10a822b7fdca4ac0024' 
  AND token = 'taIQb7GF1j8/gMzJlQN1Y3goDAW715gDJxkxLjE0DIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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