Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30b0a7536463e12a43d606de2a627d4c8b7982fa928ce88538744b5d6a372a66' 
  AND token = '2qhP2LDA1lvdWh9334cmzgVjsjCCrQuC3j/E+Ltql88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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