Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a219d784e234e781ca02801e07d41a0cd205bd1ef846fcd61626f967a3c51250' 
  AND token = 'IzHQWDDr+oxKY7nO3YGnTpbL3rUdgfGACDRA6EsE08Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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