Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '6242f66c7cf9b3c64b1094ac3b6b256c2ab43bacaafa65a1ca72dc8954b32bd1' 
  AND token = 'omw5W6W9cvZhU7JY33UetfE0LFMETlaXY3FPR9o71sU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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