Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9adc135597e8f5b12d7ed12b57d9b14722079e68154a7f1f5c39ad1a3c616926' 
  AND token = 'fO8RU2EiNk4KESEfAtJSkR/ijImq7H2rf6MpEBUmrMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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