Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4473ed6b5c90687f1e57acb3dfea2663b7e7b70aefbd349f2cc061c7c52bf13e' 
  AND token = 'viE9HznX7xi9SGz/7EDfy7oE3ALhAU872uAJNU3Wgo0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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