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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dbfe04069e7f163437ab82acbc33c1d16db9759fed2711ab0ad297e4574ed43' 
  AND token = 'Zt2OnEpmkog5pn1qKgM99P5sC7kJmOlPWOYliBym604=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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