Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb34bf8e7e66f7e75e3f85237b4cac05072f41246a5687600bd7bfdea0e4b493' 
  AND token = 'wQXl5DOCRkqRWZ5SprquZtoREPuFGCARZyCVLtXE3JY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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