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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c8c223fa2ee45b401c1fac935d08489944ab6a2a3561fa08f09cee59c13ad0e' 
  AND token = 'YiME6PTv2V4ePJpos6wJ0MgduRmw72c25IrWA3yB/rc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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