SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a55e194a2326a91cdc5bd446e891609705857fae9ab391b33bf6c79294971b18' 
  AND token = '/Q/+4311ku4C8iyhHcgipoyVDZC2zhbKGLe6nv+/HQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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