Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf71518d1f97ee54c371333f80600e5e980ab3981727852d5128696120635a01' 
  AND token = 'DfjyyHGXTKaf499y/eMx8M2Bw9VUSn+Mhq2JG7zHipg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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