Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff72ad1dafdbc2a68aaa3c481bd1381f85185c3dcfbcc2bb2a866c799c7fcddf' 
  AND token = 'QEsgrJuz9ual8eqBH+1crTAOUTJBEqORakDoAKUqr94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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