Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27e74f59328e804ec7fb15c41da237d7799f262257575c88e3e64a852155f1e6' 
  AND token = 'R/HclnTlQofhCikYZHmiUPTzy14ZJMZAexwwPd5eAKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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