Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6a27dfce8adf8900bec0fc4e96f81791664d220a1c2a4369f13a8077e6514d2' 
  AND token = 's60ck5qweeAdbtI/OJnY7GvaYBjyP83Rx3oKgoE+EOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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