Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da76442a9fa242a16520388708f275ff13381b95f2fae5f0536f82d4d23b1d52' 
  AND token = '8SxQXvsQld0c7A+wsvCKrV6Rft22SDD20kSCk8M5Ueg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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