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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb9cb6b8571f6cd963cccf26fe5cedf489b4f1dd96e4bc6782144c6735eb3435' 
  AND token = '+LQ8/WX84/yUrjB+PMQ94IAAeqcc91ZrM/FuEymiZxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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