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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07a505da24e7fce3ef28972c7826b8b894d5e04e7b890c91d1e8c1a65248767f' 
  AND token = 'vEoayHz831t4szIoLcqXr/U6wuEIs48Gu/kIcRKyEnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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