Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '895b407aa4aaf639cfb122569d0333827cc1dfaeba01b79ac0fbaae5b95be5c7' 
  AND token = 'tdH+E+m7MrHZHeLL2ufUn6G4Y3FV2zeLEH2KKdEZUCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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