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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7a969445032fb90fee661183a9959681adf1a0ffa6190cde6f3c7106b8ea6fe' 
  AND token = '00N8MaeB0b84bMxeURFoKZHoXEGyl3gpmOawSgSSUSQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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