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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '733ee0da12fd778b36ef76223eedac07833a465130c0176fdc423f73e51670c0' 
  AND token = '9HsKe/inna3kQl+rDkd6Wonn0dIwYI3PRsmib3nedeo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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