Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d0214ef69d747c55f5da57f3b1f8f0edcf6de97214e2f497d79eade87739b67' 
  AND token = '9GX0isGyWRTgCNC4U+YZmCZssg2R8A7bHNLmr6o88X4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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