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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1e118ba9b8cc00663750045d63bc2da93da9724860555ac1db8a403b71aea8c' 
  AND token = '88RFaj7HWZIKd1avTFqQQmVdkXMQcM/0Mmcb52b3pEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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