Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63bd7aa37893baba72e6ef84e16d779d4b0407980e7be418f84e46b34f0cece2' 
  AND token = 'c+QzsQvipAE9JqPylq6AIzTx1XKFixc0XJaG4cuU3ko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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