Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c60ec29b66437745dd81a57c6eee5ebf733172e3a8926474ad85e5bbe02ae112' 
  AND token = 'cZtDSoCK6pd/QKYHhjBkqn7ET25u4TuQPxaEsMxzABQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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