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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dda94b4be087b9e361ce8361d2dcb84ec666e1e6f53e5fedbfd3e87f7ba3ca0f' 
  AND token = '13UPpZr8cNZDCxfOVVMJYVVfpLlvC6Hcgxr3XneGMuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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