Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc25f3018a4f1de12346ce7f37d579e0f8c5f511f39ca1f33d03c9015f93614b' 
  AND token = 'LTRP28OGK3YrOr0nFggtd/ChKp+IiFBTUIHONks1wf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}