Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27f79bc56e552a082e55c02b2ea291ae9481bcb19cc3596c1e8a65d25eea5570' 
  AND token = 'U906Ex6A070jCzEdnOvNSRD9TozyKkoGN++cHPO+RMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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