Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79715d9d5388a4b6922a9b46afab2a7eb64b273c78b1688497ab2c76ed92174d' 
  AND token = 'KID6fTYKQOpg2AwD5WwnPYFtV/YX8DL1/CH7ub/Yo9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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