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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7025ea2408c64bb9e1ef75d2669986bd0a49ba21c076a9f70b8e89ee087f4c3d' 
  AND token = 'IVe5KStFgvWdRaImPa/JW/+7bPaBfaPPvkN9mEBm+w4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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