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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5062970687578f589799c7e86839b441a54b436f02269a91d3450c4c52d2ed9a' 
  AND token = 'S7dTDzf9lRYP0zYUB/8HmQ6ZEBvTZSoSl6NifJ1UFWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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